package com.nike.util;

import java.text.SimpleDateFormat;
import java.util.Date;

public class RondomDate {
    public void testRondomDate(){
        Date date = randomDate("2017-07-01","2018-01-01");
        System.out.println(new SimpleDateFormat("yyyy.MM.dd H:mm:ss").format(date));
    }
    /**
     * @return
     */
    public static Date randomDate(String beginDate, String endDate){
        try {
            SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
            Date start = format.parse(beginDate); // 
            Date end = format.parse(endDate); // 
            if(start.getTime() >= end.getTime()){
                return null;
            }

            long date = random(start.getTime(),end.getTime());

            return new Date(date);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static long random(long begin,long end){
        long rtn = begin + (long)(Math.random() * (end - begin));
        if(rtn == begin || rtn == end){
            return random(begin,end);
        }
        return rtn;
    }
}
